Press



W. KLOCKE.

PRESS;

APPLICATION FILED MAY 15, 1920.

Patented July 25, 1922.

2 SHEETSSHEET 1.

INVENTOR W. KLOCKE.

\ PRESS: APPLICATION FILED MAY 15, 1920.

1 A2 3, 6 l a Patented July 25, 1922.

Z SHEETSSHEET 2.

Fig 2.

l J 90 INVENTOR 29 Pin 29 WILLIAM KLOCKE, 0F WOODHAVEN, NEW YORK,ASSIGNOR TO E. W. BLISS COMPANY.

. OF BROOKLYN, NEW YORK, A CORPORATION OF WEST VIRGINIA.

essrs.

Application filed May 15,

T 0 all whom it may concern:

Be it known that 1, WILLIAM KLOCKE, a citizen of the United States ofAmerica, residing in Woodhaven, in the borough and county of Queens,city and State of New York, have invented certain new and usefulImprovements in Press es, of which the following is a specification.

This invention relates to presses, and aims to provide improvementstherein.

' The present invention provides a press wherein the punch slide isdriven with a uniform motion upon its working stroke and has definitelimits as to the extremes of its working stroke, whereby the press maybe employed to advantagein making long draws upon a blank or shell, suchas is customary in drawing deep shells. The invent-ion further enablessheets or shells to be drawn of a definite depth and with a flange atits upper end. The invention may further provide for a quick return ofthe punch slide on its upstroke.

The press or presses of the present invention may include the punchslide actuating combination, in combination, or not, as may be desired,with other parts or mechanism of a press, as for instance theblank-holder and its actuating mechanism, herein set forth.

An embodiment of the invention is illustrated in the accompanyingdrawings. In said drawings,-

Figure 1 is an end-view of a press embodying the'present invention, and

Fig. 2 is a side view of the construction shown in Fig. 1, certain partsthereof being shown in section. v

Fig. 3 is a diagrammatic view illustrating certain of the parts of thecrank shaft actuatin mechanism in a plurality of positions. Fig. 4illustrates, by means of a curve, the movement and motion of the punch,slide 10, and also shows, by means of dots, corre sponding positions ofthe pin 29 and crank 13.

Referring to said drawings, numeral 10 I designates a punch slideconnected, in a suit able manner, to a crank shaft 12; 14 designates thebed of the press and 16 the slide which ordinarily carries a blankholder or die, in accordance with the design of the press, the slidehere being shown as a blank holder slide, the die 18 being carried uponthe bed 14.

Specification of Letters Patent.

racemes duty 25, 1922. 1920. swarm. as m'z.

The crank connection of the punch slide 10 to the crank shaft 12definitely limits the throw of the punch slide upon its forward andreturn movements, and consequently definitely limits the throw of thepunch on the working stroke.

Suitable means 20 are provided for driv ing the crank shaft 12 in suchmanner that the punch slide 10 has a uniform movement .upon its workingstroke. These means conveniently comprise a driving part, such as a gearor pulley, here shown as a gear 22 mounted to turn on a hub 23 on theframe of the press. The crank shaft 12 is so located that it passeseccentrically through the hub 23 and is hence eccentric to the center ofrotation of the driving part 22. The crank shaft 12 is connected to thedriving part 22 conveniently through an arm 25 fixed upon,

the crank shaft 12 and a link 27 attached at one end to the arm. 25, andat its other end to a crank pin, or equivalent, 29 upon the driving part22. The driving part 22 hence acts to turn the crank shaft 12 throughthe connecting parts 25 and 27. The blank holder slide actuatingmechanism, which may be of any suitable type, is-conveniently connectedto a pin 31 (or the equivalent) adapted to be seated in the socket 32formed upon the arm 25 attached to the crank shaft 1 Patent N o.1,411,036,and said mechanism is claimed in said application. Themechanism conveniently comprises a guide link 40, a rock-shaft 42 and apair-of toggles 44, 45, connected respectively to the slide 16, and tothe guide link 40. 47 is a connecting rod or link connected at one endto the crankpin 31 and at its other end to the toggle 45. The functionof this mechanism is to provide a dwell of considerable duration of theslide 16 in the blank holding position, as set forth at length in theaforesaid Klocke and Dobson application.

Operation: Referring to Fig. 3, the crank 13 on the crankshaft 12 isshown in full lines as at the top of the up stroke, and the punch slide10 is consequently at the limit of its up stroke and about to begin itsworking stroke. As the point of connection 29 on the driving part 22turns through the succeeding 225 of movement, it will be seen thatduring the first 45 of movement of 7 part of its movement which isordinarily slow and hence the net result of the action of the connectingparts 25, 27 will be to move the crank relatively uniformly fast fromits'90 position to about its 135 position. During the next of movementof the point 29, (from 135 to 180) there will be abending toward oneanother of the connecting parts 25, 27 and hence there will be arelative loss of motion between the'point 29 and the crank 13. Inasmuch,however, as the crank 13 will be moving through that part of itsmovement which commumcates a relatively fast motion to the punch slide10,

the action of the connectin parts 25, 27 will be to slow the movement 0the crank so that the movement of the punch slide from its 135 to 180position will be at approximately the same rate as from its 90 positionto its 135 position. The movement of the punch slide 10 will, therefore,be uniform, or substantially uniform from the 90 position of the crank13 to substantially the 180 position.

Through the next 45 of movement of the A point 29 on the driving part22, the connecting parts 25, 27 Wlll bend further toward one another,and as the crank 13 is moving from approximately its 180 position to its225 position, the movement of the punch slide will be slowed. Themovement of the punch slide will, therefore, be

substantially at the same rate as from the 90 position of the crank tothe 180 position thereof. Consequently, the movement of the punch slidewill be substantially uni form from its 90 position to approximately its125 position.

Through the next 45 of movement of the point 29, which brings the partsto the position shown in dotted lines, Fig. 3,- corresponding to thelimit of the working stroke of the punch slide 10 the connecting parts25,.27 bend toward one another, so that the action of the saidconnecting parts upon the crank 13 is to continue the movement of thepunch slide 10 at the same rate as from its movement from its90'position to its 225 position, and to show the movement of said punchas the crank 13 reaches its 270 position and the slide 10 reaches theend of its working stroke. Therefore, the punch slide moves very slowlyatthe end of the stroke,

of the parts shown in ful lines, there will be a bending away from oneanother of the connecting parts 25, 27, which will produce acomparatively rapid upstroke of the unch slide. The movement of thepunch slide 10 on its upstroke (corresponding to 180 of movement of thecrank 13) will, therefore, all take place while the point 29 is movingthrough a total of 135. It will be seen from the fore oing (and fromFig. 4:) that the punch sli e is moved at a substantially uniform speedthroughout its working stroke, the motion being slowed or eased at theends of thestroke. The various positions of the crank 13 and punch slide10,

corresponding to movement of the pin 29 through one cycle, and plottedatpositions 45 apart, is shown by the dots in Figs. 3 and 4. a Y I As theblank-holder (carried by theslide 16) will hold the blank during thetime that the punch (carried by the slide 16) is upon a greater or lesspart of its working stroke (according to deslgn) the rate of the drawingaction of the unch u on the 'work held by the blank-hol er, wil besubstantially uniform. With the resent ress, it will be possible to draws 811501 lanks which are ordinarily drawn upon hydraulic or gearactuated punches, which work cannot ordinarily be performed upon presseswith the ordinary crank-driven unch'es.

While the unch-sli e actuating mechanism of the invention has been shownas embodied in a press with a blank-holder, it may, nevertheless be usedin presses without blank-holders.

The invention may receive other embodiments than that hereinspecifically illustrated and described. 7

'What is claimed is 1. A press comprising a punch, a die, means fordriving said. punch with. a uniform motion on its working stroke, saidmeans comprising a part to which said punch is connected, having a crankmotion, whereby said punch has definite limits to the ex.- tremes of itsmovement.

2. A press comprising a punch, and a die,

ing part, and connections between said crank-shaft and driving part,adapted to impart a uniform movement to said punch on its workingstroke.

3. A press comprising a punch and a die, a crank-shaft .for drivin saidpunch, and means for driving said crankshaft, said punch is an easymovement. Moreover, it i means comprising a uniformly moving drivingpart and connections between said crankshaft and driving part, adaptedto impart a uniform movement to said punch on its working stroke, saidworking stroke being of longer duration than the'return stroke.

4. A press comprising a punchand a die,

,and a link connecting said arm and driving part.

5. A press comprising a punch and a die, a crankshaftfor driving saidpunch, and means for driving said crankshaft, said means comprising auniformly moving driving part and connections between said crankshaftand driving part, adapted to impart a uniform movement to said punch onits working stroke, said crank-shaft being eccen- 1 ing part andconnections between said crankshaft and driving part, adapted to imparta uniform movement to said punch on its working stroke, saidcrankshaft-being eccentric of said driving part, and said connectionscomprising an arm on said crank shaft and a'link connecting said arm anddriving part, said arm being substantially at right angles to said crankon said crankshaft.

7. A press comprising a punch and a. die, a crank-shaft for driving saidpunch, and means for driving said crank-shaft, said means comprising auniformly moving driving partand connections between said crankshaft anddriving part, adapted to impart a uniform movement to said punch on itsworking stroke, said crank-shaft being eccentric ofsaid driving part,and said con- 'IIBCtlOIlS comprising an arm on said-crankshaft and alink connecting said arm and driving part, said arm being substantiallyat right angles to said crank on said crankshaft, and said link havingits point of attachment to said driving part substantially in line withsaid crank when said crank is at a position at one extreme of its throw.

8. A press comprising a punch and a die, a crank-shaft for driving saidpunch, and means for driving said crank-shaft, said means comprising auniformly moving driving part and connections between said crankshaftand driving part, adapted to impart a uniform movement to said punch onits working stroke, said crank-shaft being eccentric of said drivingpart, and said connections comprising an arm on said crankshaft and alink connecting said arm and driving part, said arm having thereon meansforconnecting a blank-holder or die carryin slide connecting rod thereton "witness whereof, I have hereunto signed my name.

-WILLIAM KLOGKE.

